package com.lijj.educenter.controller;

import com.google.gson.Gson;
import com.lijj.commonutils.JwtUtils;
import com.lijj.educenter.entity.UcenterMember;
import com.lijj.educenter.service.UcenterMemberService;
import com.lijj.educenter.utils.ConstantWxUtils;
import com.lijj.educenter.utils.HttpClientUtils;
import com.lijj.servicebase.exceptionhandler.JunjieException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import java.net.URLEncoder;
import java.util.HashMap;

@CrossOrigin
@Controller
@RequestMapping("/api/ucenter/wx")
public class WxApiController {

    @Autowired
    private UcenterMemberService ucenterMemberService;

    //2 获取扫描人信息，添加数据
    @GetMapping("callback")
    public String callback(String code, String state) {
        try {
            //1 获取code值，临时票据，类似于验证码

            //向认证服务器发送请求换取access_token
            String baseAccessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token" +
                    "?appid=%s" +
                    "&secret=%s" +
                    "&code=%s" +
                    "&grant_type=authorization_code";
            //拼接三个参数： id 秘钥 和code值
            String accessTokenUrl = String.format(
                    baseAccessTokenUrl,
                    ConstantWxUtils.WX_OPEN_APP_ID,
                    ConstantWxUtils.WX_OPEN_APP_SECRET,
                    code);

            //请求这个拼接好的地址，得到返回两个值 access_token 和openid
            //使用httpClient发送请求，得到返回结果
            String accessTokenInfo = HttpClientUtils.get(accessTokenUrl);

            System.out.println("accessTokenInfo:" + accessTokenInfo);

            //2 拿着code请求微信固定的地址，得到两个值 access_token 和 openid
            //把accessTokenInfo字符串转换成map集合，根据map里面key获取对应值
            //使用json转换工具 Gson
            Gson gson = new Gson();
            HashMap mapAccessToken = gson.fromJson(accessTokenInfo, HashMap.class);
            String access_token = (String) mapAccessToken.get("access_token");
            String openid = (String) mapAccessToken.get("openid");



            //把扫码人信息添加到数据库里面
            //判断数据库里面是否存在相同微信信息，根据openid判断
            UcenterMember member = ucenterMemberService.getOpenIdMember(openid);
            if (member == null) { //member是空，表里面没有相同数据，进行添加
                //3 拿着得到access_token 和 openid，再去请求微信提供固定的地址，获取到扫描人信息
                String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +
                        "?access_token=%s" +
                        "&openid=%s";
                //拼接两个参数
                String userInfoUrl = String.format(
                        baseUserInfoUrl,
                        access_token,
                        openid
                );
                //发送请求
                String userInfo = HttpClientUtils.get(userInfoUrl);
                System.out.println("userInfo:" + userInfo);
                //获取返回userinfo字符串扫描人信息
                HashMap userInfoMap = gson.fromJson(userInfo, HashMap.class);
                String nickname = (String) userInfoMap.get("nickname"); //昵称
                String headimgurl = (String) userInfoMap.get("headimgurl"); //头像

                member = new UcenterMember();
                member.setOpenid(openid);
                member.setNickname(nickname);
                member.setAvatar(headimgurl);
                ucenterMemberService.save(member);

            }
            //使用jwt根据member对象生成token字符串
           String jwtToken = JwtUtils.getJwtToken(member.getId(),member.getNickname());

            //最后返回首页面，通过路径传递token字符串
            return "redirect:http://localhost:3000?token=" + jwtToken;
        } catch (Exception e) {
            throw new JunjieException(20001, "登录失败");

        }
    }


    //1 生成微信扫描二维码
    @GetMapping("login")
    public String getWxCode() {
//        String url ="https://open.weixin.qq.com/connect/qrconnect?appid=" + ConstantWxUtils.WX_OPEN_APP_ID + "&response_type"
        // 微信开放平台授权baseUrl
        String baseUrl = "https://open.weixin.qq.com/connect/qrconnect" +
        "?appid=%s" +
        "&redirect_uri=%s" +
        "&response_type=code" +
        "&scope=snsapi_login" +
        "&state=%s" +
        "#wechat_redirect";
        //请求微信地址

        //对redirect_url进行Encoder编码
        String redirectUrl = ConstantWxUtils.WX_OPEN_REDIRECT_URL;
        try {
            redirectUrl = URLEncoder.encode(redirectUrl, "utf-8");
        } catch (Exception e) {
            e.printStackTrace();
        }

        String url = String.format(baseUrl,
                ConstantWxUtils.WX_OPEN_APP_ID,
                redirectUrl,
                "junjie");
        return "redirect:" + url;
    }
}
